Dorman 800-955 GM Air Conditioning Schrader Valve M12 X 1.50 Compatible with Select Models

Old one on 2004 silverado was spitting out freon. This one took minutes to change and fits perfect, holds pressure well. Cheap part, easy install.

Works like OEM part and seems to be holding up well

works fixed my ac leak

This fit perfectly on my 2002 pontiac bonneville.

I bought this to replace the high-side service port on my 1998 Dodge Dakota 4x2 V6. Amazon thinks it doesn't fit this vehicle, but other online sources indicate it does, so I took a chance. Amazon is wrong.The attached photo shows both this part (on the left, w. the green O-ring) and the original Chrysler part (on the right, w. the red O-ring).As you can see from the photo, the machining on this part is substantially better than on the Chrysler part -- compare the crest of the thread on both parts. The crest on this part is clean and sharp; the crest on the Chrysler part is very rough and ratty looking.This thread is generally well protected over its lifetime by the fitting into which it screws, so we know the ratty thread on the Chrysler part is from the manufacturer rather than damage over the last 24 years of use.Assuming these parts are typical of both manufacturers, then it appears the manufacturer of this part just cares more than the manufacturer of the Chrysler original who chose to continue using cutting tools long past their "sharpen by" date. And if they care more about the areas (like this thread) that don't absolutely have to be perfect, then I'll assume they also care more about the areas (and materials & tolerances) I can't adequately inspect that really DO matter.EDITED 2022-12-18. I've had to reduce my rating from 5 to 4 stars, because of a dimensional tolerance issue. This service port is designed to be installed and removed using an unusual 8-sided socket made specifically for standard R134A high-side service ports. I purchased the Auto Supply K13001 socket set (https://www.amazon.com/dp/B07FQBSSWV), which includes sockets for both high- and low-side ports. The high-side socket measures 15.69 .. 15.73 mm across the flats. The original Chrysler service port measures 15.56 .. 15.66 mm across the flats (depending on which pair of flats you measure), providing a snug fit to the socket. I've not seen formal drawings of either part, but presume from my available samples that the port is supposed to be 15.6 mm across the flats, and the socket is supposed to be 15.7 mm across the flats.But the Dorman part measures only 15.29 .. 15.33 mm across the flats, and only 15.78 .. 15.79 mm across the points. That makes it a VERY loose fit in the socket, and easily damaged by a 15.72 mm socket if you torque it too hard during installation. So it appears Dorman is making this part about 0.3 mm undersized in that area, and the difference may make installation and removal more difficult than necessary.Sherco makes a very similar (though somewhat more expensive) high-side service port (https://www.amazon.com/dp/B097W3ZNJX) which should be directly compatible with this one. It may be a better fit to the socket than this, but I've NOT purchased one to see.

Replaces the OEM high side port on my Chevy Suburban.These OEM ports all leak after a time and you can't replace just the core. You can tell if you have one by peering into the bore of the high side fitting. If it looks like a little balck rubber ball it is OEM style if not actual OEM. You have to pump down the whole system and replace the entire port fitting. Once the fitting is off you then have to pull a good vacuum on the entire system before recharging. If you don't have a vacuum pump it is off to the pro's to do the job --- but take this little fiting with you and have them use it instead of OEM replacement.Once this replacement Schrader valve fitting is installed you can just replace the core when it starts to leak, and that can be done with a special tool that does the job without pumping down the system. The Schrader valve looks like the inside of a valve on a tire or bicycle tire. The inside of the valve unscerws and gets replaced while the body of hte fitting stays in place.They sell those special tools here on Amazon. Search for "134a valve core quick remove and replace tool." A bunch of them should pop up at various price levels and kits.BTW the low side port on my Chevy is already a Schrader fitting so I can replace that core the same way with a similar tool for the low side.Peter

Like these better than the ball type

No auto parts stores knows what it is ac high pressure shrader valve, Amazon has it at my house and I had it in my Chevy working great thanks